Piano tuning-pin



(No Model.)

' F. E. H. GOODENOW.

' PIANO TUNING PIN.

No. 375,150. Patnted Dec. 20, 1887.

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UNITED STATES PATENT OFFICE.

FRED E. H. GOODENOW, OF SPRINGFIELD, MISSOURI.

PIANO TUNING-PIN.

SPECIFICATION forming partof Letters Patent No. 375,150, dated December20, 1887.

Application filed May 11, 1887. Serial No.237,850. (No model.)

To all whom it may concern.-

Be it known that I, FRED E. H. GooDENow, of Springfield, in the countyof Greene and State of Missouri, have invented a new and ImprovedTuning-Pin for Musical Instruments, of which the following is a full,clear, and exact description.

Theobject of my invention is to provide a new and improved tuning-pinfor pianos and other musical instruments, which pin is securely held inplace and is not materially influenced by a changeof temperature.

The invention consists of certain parts and details and combinations ofthe same, as will befullydescribed hereinafter,and then pointed out intheclaims.

Reference is to be had to the accompanying drawings, forming a part ofthis specification, in which similar letters of reference indicatecorresponding parts in all the figures.

Figure 1 is a sectional elevation of my improvement. Fig. 2 is a sideelevation of the bushing in which the tuning-pin turns. Fig. 3 is a planview of the same. Fig. 4 is a side elevation of the clamping-collar.Fig. 5 is a plan view of the same. Fig. 6 is a side elevation of the nutfor screwing the clamping-collar against the bushing, and Fig. 7 is aplan view of the same.

My improved tuningpin A is provided on its upper part with the shank B,having the usual aperture, B, in which is fastened one end of a string,S, adapted to be wound on said shank B. The upper end, B", of the latteris square in cross-section, and is adapted to fit into thesimilarly-shaped tuning-hammer, by which the tuning-pin A is turned toadjust the string S.

On the shank B is formed the collar 0, and from the under side of thecollar 0 projects the round part D of the pin A, which partD continuesinto the square part E, and the latterterminates in the threaded portionF. The round part D of the pin A fits into a round aperture in thesquare bushing G,in which the pin A turns, said bushing G beingpreferably of brassand held vertically in a square aperture formed inthe cross-beam H, of iron or other suitablematerial, and secured to thepiano or other musical instrument on which 1 my improvement is used. Onthe top and bottom of the bushing G are held the washers I and I,respectively, which are preferably of the same material as the bushing Gand fitted loosely on the round part D of the pin A.

A clamping-collar, J, is provided with acentral square aperture,whichfits upon the square part E of the pin A and turns with the latter.

The square a erture of the clamping-collar J- extends only half theheight of said collar,and is continued into a round aperture, J, ofsufficient size to fit, when necessary,over the round portionD of the toning-pin A. On the threaded portion F of the tuning-pin A screws the nutK, which is provided near-its upper end with an enlarged aperture, K,adapted to slide over the square portion E of the tuning-pin A whenevernecessary. The washers I and 1 extend slightly beyond the edges of thefixed bushing G, so as to rest with their clampingfaces against the topand bottom, respectively, of the cross-beam H, as shown in Fig. 1.

My improved tuning-pin A is put in position in the following manner: Thefixed bushing G is placed in the respective aperture in the cross-beamH, and then the pin A is inserted into the central aperture of thebushing G, with the washer I held between the bushing and the fixedcollar G on the round part D of the pin A, so that the under side of thefixed collar O rests on the top of said washer I, the bottom of whichrests partly on the top of the bushing G and partly on the top of thecrossbeam H. The washer I is then slipped on the lower end of the roundpart of the pin Auntil it rests against the'lower end of the bushing Gand against the bottom of the cross-beam H, as shown in Fig. l. Theclamping-collar J is then slipped over the threaded portion F upon thesquare part E, and then the nut K is screwed on the threaded portion Funtil the clamping-collar J is pressed by said nut K against the underside'of, the washer I. It will be seen that the pin A is now held firmlyin place in the bushing G and on the washers I and I, and is preventedfrom moving in the direction of the pull exerted against the pin A bythe string S.

Then the piano-tuner desires to turn the tuning-pin A, he fits histuning-hammer on the square part B of the shank B and turns the hammerin the usual manner and with such force as to overcome the pressure withwhich the pin A is clamped by the nut J against the washers I and I, sothat the tuning-pin A turns in the bushing Gto the amount required fortuning the string S.

It will further be seen that as the tuning-pin A and its connectingparts are preferably made of metal the pin A is not liable to beaffected by change of temperature,as the ordinary pins are, on accountof being screwed into wood, which is liable to be shrunken by change oftemperature. The bushing G and the washers I and I, on account of beingbrass, prevent the transmission of metallic sounds from the crossbeam Hto the tuning-pin A and itsstring S.

The clamping-collar J is provided with the round aperture J, so as topermit of using the same pin, A, in case the bushing G is of lessheight, whereby said round aperture J fits over the round portion D ofthe pin A. Ina similar manner the nutK is provided with the roundaperture K, which is sufficiently large to fit over the square part E ofthe tuningpin A.

Having thus fully described my invention, I claim as new and desire tosecure by Letters Patent- 1. The combination, with a tuning-pin having afixed collar, of a fixed bushing in which said pin turns, washers heldon said pin and against the top and bottom of said bushing, aclamping-collar held on said pin and turning with the same, and a nutfor pressing said clamping-collar against thelower washer, substantiallyas shown and described.

2. The combination, with a tuning-pin having a fixed collar, of a fixedbushing in which said pin turns, washers held on said pin and againstthe top and bottom of said bushing, a clamping-collar having a squareaperture and held on the square part of the said tuning-pin, and a nutscrewing on the threaded lower end of said tuning-pin and against saidclampingcollar, so as to press the latter against the bottom of saidlower washer, substantial] yasshown and described.

3. The cross-beam H, provided with a series of square apertures, asquare bushing, G, held in each of said square apertures, and washers Iand I,held, respectively,on the top and bottom of said bushing and saidcross-beam, in combination with the tuning-pin A, having a fixed collar,0, resting on the upper washer, the clamping-collar J, having a squareaperture and fitted on the square part Eof said pin A,the

nut K, screwing on the threaded portion F of the pin A and adapted topress said clampingcollar J against the lower washer, I, substantiallyas shown and described.

FRED E. H. GOODENONV.

Witnesses:

THEo. G. I-IosTER, E. M. CLARK.

